強制的にtimeout扱いで例外を上げるwrapper function

forceTimeout.js

class ForceTimeout extends Error {
  get name () { return 'ForceTimeout' }
}

async function forceTimeout (time, cb) {
  const intervalId = setInterval(() => {
    throw new ForceTimeout()
  }, time)

  try {
    await cb()
  } catch (e) {
    clearInterval(intervalId)
    throw e
  }
  clearInterval(intervalId)
}

module.exports = forceTimeout